It's a good iniciative, although I think it should be managed carefully. You guys who will run it must take care of what you say, we don't want to be hated by something wrong said on twitter. People who see the messages may think thats the opinion of the whole site, and that's a little bit dangerous. Just a warning!
About the fact of the managers of the account, they have the disponibility to work on this, but I think older members could help them too if it's the case. Well, that's something for the moderators to discuss.
Besides that, good job guys! Really hope this works and increase the popularity of our site.